• An ISO 9001:2015 Certified Company
  • Call

    +91 9930108105

  • Address

    Sanghvi Galaxy, Shop No.2, Khetwadi
    10th Lane, Mumbai-400004, India

Stainless Steel 904L Ferrule Fittings

Stainless steel 904l ferrule fittings specifications

What is 904L stainless steel used for?

This grade, alloyed with 23-28% chromium, 4-5% nickel, and molybdenum, enjoys favour with many industrial applications. Stainless steel 904L ferrule fittings display excellent resistance to corrosion and pitting and have a low carbon content that protects against intergranular corrosion.

The core applications of this superaustenitic stainless steel are in chemical processing plants for producing phosphate-based fertilisers. 904L ferrule fittings are straightforward to install and deliver leak-tight performance in petrochemicals, bleaching equipment for paper production, and gas desulfurisation.

SS 904L instrumentation fittings use a double-ferrule arrangement for a firm and secure mechanical grip between tubing. The basic structure includes a body, a nut, and the ferrule.

SS 904L compression fittings supplier in India


Specification of stainless steel 904l ferrule fittings

Specifications Size Working pressure
ASME B1.20.1, SAE AS71051 2mm - 50 mm Upto 2000 - 6000 PSI
End connection thread type Finish Types
NPT, BSP, BS, ASME, SAE, UNF, ISO Mill finish, annealed, pickled, mirror polish Ferrule fittings, compression fittings, instrumentation fitting, Union, Coupling

Buy ASME 182 904L instrumentation fittings at factory price in Mumbai, we provide latest testing to verify their strength and corrosion resistance

What are the properties of Stainless Steel 904L Ferrule Fittings?

Ferrule fittings are standard piping components to build leak-proof and well-aligned connections. WNR 1.4539 tube fittings usually get manufactured in sizes of 1/8 to 2 inches for pressure ratings up to 10,000 psi.

904L stainless steel double ferrule fittings can withstand seawater, sulfuric acid, and chlorides without experiencing damage or loss in strength. They are highly corrosion resistant, with an average PREN of 36.7.

Here are other properties that make them sought after by many industries:

  • Can handle severe temperatures up to 450°C
  • High tensile and yield strength of 490 and 220 MPa
  • Retain mechanical properties at elevated temperatures
  • Ideal for changing thermal conditions in heat exchangers and condensers
  • Good weldability using standard techniques
  • Easy to fabricate for diverse purposes

SS 904L compression fittings mandate strict manufacturing with dimensional accuracy to guarantee failure-free performance.

Types of SS 904l instrumentation fittings


SS 904L ferrule fittings

SS 904L ferrule fittings

904L compression fittings

904L compression fittings

UNS N08904 904L instrumentation fittings

UNS N08904 904L instrumentation fittings

WNR 1.4539 SS 904L tube fittings

WNR 1.4539 SS 904L tube fittings

Check sizes and dimensions of stainless steel 904L double ferrule fittings

How does the tensile strength of Stainless Steel 904L Ferrule Fittings vary with temperature?

Buyers must consider environmental factors while choosing ASTM B649 UNS N08904 ferrule fittings. These components boast excellent mechanical strength even in elevated conditions.

As a rule of thumb, the tensile strength increases when the temperature reduces. It comes down when the temperature increases since the grain size and the dislocation density rise.

On the other hand, the ductility of SS 904L tube fittings decreases with decreasing temperature.

Dimensions of stainless steel 904l compression fittings


OD actual OD Thread - NB Thread per inch
(inches) (fraction inch) (inches) BSP  NPT
0.405 13/32 1/8 28 27
0.3125 5/16 1/16 28 27
0.675 43/64 3/8 19 18
0.540 35/64 1/4 19 18
0.840 27/32 1/2 14 14
1.315 1-5/16 1 11 11-1/2
1.050 1-3/64 3/4 14 14
1.660 1-21/32 1-1/4 11 11-1/2
2.375 2-3/8 2 11 8
1.900 1-29/32 1-1/2 11 11-1/2
2.875 2-7/8 2-1/2 11 8
4.0 4 3-1/2 11 8
3.5 3-1/2 3 11 8
4.5 4-1/2 4 11 8
6.625 6-5/8 6 11 8
5.563 5-5/8 5 11 8

Chemical composition of SS 904L compression fittings


C Si Mn S P Ni Cr
0.08 max 0.75 Max 2 max 0.030 max 0.045 max 8 - 11 18 - 20
Get the vast selection of ASTM B649 UNS N08904 tube fittings delivered anywhere, in any quantity, and in any size!

Mechanical properties of SS 904l tube fittings


Grade Density Tensile strength Melting points Elongation Yield strength(0.2% offset)
SS 8.0g/ cm3 PSI-75000, MPa-515 1400°C (255°F) 35% PSi-30000, MPa-205
Refer our online datasheet before buying stainless steel 904L instrumentation fittings, check our stock

Equivalent grade of stainless steel 904l double ferrule fittings


Standard Werkstoff nr. UNS JIS BS GOST AFNOR EN
SS 1.4301 S30400 SUS 304 304S31 08X18H10 Z7CN18-09 X5CrNi18-10

Other types of SS 904l ferrule fittings


SS 904L male connector

SS 904L male connector

904L female connector

904L female connector

SS 904l front ferrule

SS 904l front ferrule

SS 904l back ferrule

SS 904l back ferrule

SS 904L bulkhead union

SS 904L bulkhead union

904L equal union

904L equal union

SS 904l male elbow

SS 904l male elbow

SS 904l reducing union

SS 904l reducing union

Applications of stainless steel 904l instrumentation fittings


  • → Textile machinery
  • → Pulp and paper industry
  • → Oil and gas industry
  • → Furniture
  • → Synthetic fiber
  • → Power plants
  • → Pharmaceutical processing industry
  • → Energy industries
  • → Dairy and food processing
  • → Fluid piping
  • → Modern architecture
  • → Home appliances
  • → Heat exchanger
  • → Water waste projects

Pressure ratings of SS 904l tube fittings


Male Female
NPT/BSPT Shape Straight Shape Straight
1/16 9500 10000 7000 7500
3/8 7200 07200 5000 5300
1/4 7500 07500 5600 6600
1/2 5800 06600 4500 5200
1 4600 04600 3900 4500
3/4 6400 06400 3500 4300
1-1/4 3500 03500 3100 3500
2 2600 02600 2300 2700
1-1/2 2900 02900 2500 3200
1/8 9100 09100 5500 6400